Combine raspberries and sugar in a medium saucepan over low heat. Cook, stirring, for 1 minute or until sugar dissolves. Increase heat to high and bring to the boil. Cook, stirring, for 2 minutes or until syrup thickens slightly. Remove from heat.

Step 2

Place raspberry mixture in a food processor and process until smooth. Transfer to a sieve and strain into a medium glass bowl. Pour into a sealable bottle.

Step 3

Pour cordial among glasses, top with sparkling wine or mineral water and ice.